mi: Create miPolylines as a general-purpose line drawing function

Instead of requiring all drivers to figure out which mi function to
call for each of the four cases, create a single wrapper in mi that
handles them correctly. Now drivers can simply use miPolylines in all
cases.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Eric Anholt <eric@anholt.net>

2 files changed, 26 insertions, 0 deletions

diff --git a/mi/mi.h b/mi/mi.h
index 1209a16c4..b8a4f0568 100644
--- a/mi/mi.h
+++ b/mi/mi.h
@@ -452,6 +452,12 @@ extern _X_EXPORT void miWideDash(DrawablePtr /*pDrawable */ ,
                                  DDXPointPtr    /*pPts */
     );
 
+extern _X_EXPORT void miPolylines(DrawablePtr pDrawable,
+                                  GCPtr pGC,
+                                  int mode,
+                                  int npt,
+                                  DDXPointPtr pPts);
+
 /* miwindow.c */
 
 extern _X_EXPORT void miClearToBackground(WindowPtr /*pWin */ ,
diff --git a/mi/miwideline.c b/mi/miwideline.c
index b76e7a818..29ba12c69 100644
--- a/mi/miwideline.c
+++ b/mi/miwideline.c
@@ -1979,3 +1979,23 @@ miWideDash(DrawablePtr pDrawable, GCPtr pGC,
     if (spanData)
         miCleanupSpanData(pDrawable, pGC, spanData);
 }
+
+void
+miPolylines(DrawablePtr drawable,
+            GCPtr gc,
+            int mode,
+            int n,
+            DDXPointPtr points)
+{
+    if (gc->lineWidth == 0) {
+        if (gc->lineStyle == LineSolid)
+            miZeroLine(drawable, gc, mode, n, points);
+        else
+            miZeroDashLine(drawable, gc, mode, n, points);
+    } else {
+        if (gc->lineStyle == LineSolid)
+            miWideLine(drawable, gc, mode, n, points);
+        else
+            miWideDash(drawable, gc, mode, n, points);
+    }
+}